./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test22-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test22-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3b319f31812cf6dfaa3cae4a89a0875c72839a3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:06:21,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:06:21,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:06:21,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:06:21,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:06:21,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:06:21,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:06:21,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:06:21,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:06:21,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:06:21,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:06:21,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:06:21,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:06:21,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:06:21,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:06:21,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:06:21,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:06:21,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:06:21,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:06:21,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:06:21,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:06:21,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:06:21,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:06:21,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:06:21,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:06:21,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:06:21,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:06:21,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:06:21,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:06:21,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:06:21,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:06:21,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:06:21,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:06:21,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:06:21,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:06:21,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:06:21,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:06:21,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:06:21,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:06:21,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:06:21,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:06:21,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:06:21,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:06:21,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:06:21,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:06:21,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:06:21,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:06:21,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:06:21,919 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:06:21,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:06:21,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:06:21,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:06:21,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:06:21,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:06:21,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:06:21,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:06:21,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:06:21,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:06:21,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:06:21,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:21,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:06:21,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:06:21,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:06:21,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:06:21,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:06:21,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:06:21,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:06:21,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3b319f31812cf6dfaa3cae4a89a0875c72839a3 [2021-08-29 09:06:22,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:06:22,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:06:22,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:06:22,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:06:22,241 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:06:22,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-1.c [2021-08-29 09:06:22,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67dfd657d/884910955e964f3697e13e3b8cbbb93c/FLAGb7da1b27f [2021-08-29 09:06:22,676 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:06:22,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c [2021-08-29 09:06:22,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67dfd657d/884910955e964f3697e13e3b8cbbb93c/FLAGb7da1b27f [2021-08-29 09:06:22,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67dfd657d/884910955e964f3697e13e3b8cbbb93c [2021-08-29 09:06:22,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:06:22,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:06:22,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:22,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:06:22,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:06:22,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cd3c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22, skipping insertion in model container [2021-08-29 09:06:22,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:06:22,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:06:22,855 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2021-08-29 09:06:22,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:22,869 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:06:22,896 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c[1029,1042] [2021-08-29 09:06:22,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:22,912 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:06:22,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22 WrapperNode [2021-08-29 09:06:22,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:22,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:22,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:06:22,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:06:22,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:22,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:06:22,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:06:22,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:06:22,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:22,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:23,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:23,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:23,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:23,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:06:23,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:06:23,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:06:23,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:06:23,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (1/1) ... [2021-08-29 09:06:23,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:23,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 09:06:23,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 09:06:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:06:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:06:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:06:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:06:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:06:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:06:23,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:06:23,289 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-29 09:06:23,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:23 BoogieIcfgContainer [2021-08-29 09:06:23,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:06:23,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:06:23,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:06:23,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:06:23,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:06:22" (1/3) ... [2021-08-29 09:06:23,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995e404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:23, skipping insertion in model container [2021-08-29 09:06:23,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:22" (2/3) ... [2021-08-29 09:06:23,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7995e404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:23, skipping insertion in model container [2021-08-29 09:06:23,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:23" (3/3) ... [2021-08-29 09:06:23,297 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-1.c [2021-08-29 09:06:23,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:06:23,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 09:06:23,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:06:23,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 09:06:23,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 09:06:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:06:23,387 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:23,388 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:23,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 164664103, now seen corresponding path program 1 times [2021-08-29 09:06:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:23,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279704207] [2021-08-29 09:06:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:23,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:23,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:23,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279704207] [2021-08-29 09:06:23,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279704207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:23,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:23,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 09:06:23,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499541036] [2021-08-29 09:06:23,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 09:06:23,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 09:06:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:06:23,660 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:23,755 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-08-29 09:06:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:06:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-29 09:06:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:23,774 INFO L225 Difference]: With dead ends: 34 [2021-08-29 09:06:23,774 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 09:06:23,777 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:06:23,779 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.28ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:23,780 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 81.28ms Time] [2021-08-29 09:06:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 09:06:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 09:06:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-29 09:06:23,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2021-08-29 09:06:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:23,804 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-29 09:06:23,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-29 09:06:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 09:06:23,806 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:23,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:23,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:06:23,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 603612068, now seen corresponding path program 1 times [2021-08-29 09:06:23,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:23,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320410834] [2021-08-29 09:06:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:23,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:24,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:24,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320410834] [2021-08-29 09:06:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320410834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:24,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:24,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 09:06:24,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999357445] [2021-08-29 09:06:24,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 09:06:24,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 09:06:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:24,056 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:24,579 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-08-29 09:06:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 09:06:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 09:06:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:24,583 INFO L225 Difference]: With dead ends: 96 [2021-08-29 09:06:24,584 INFO L226 Difference]: Without dead ends: 91 [2021-08-29 09:06:24,588 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 315.74ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-29 09:06:24,590 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.90ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.13ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:24,591 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 8.90ms Time], IncrementalHoareTripleChecker [24 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 217.13ms Time] [2021-08-29 09:06:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-29 09:06:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 33. [2021-08-29 09:06:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-08-29 09:06:24,608 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2021-08-29 09:06:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:24,609 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-08-29 09:06:24,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-08-29 09:06:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 09:06:24,611 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:24,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:24,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 09:06:24,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -407505182, now seen corresponding path program 1 times [2021-08-29 09:06:24,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:24,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102492639] [2021-08-29 09:06:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:24,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:24,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:24,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102492639] [2021-08-29 09:06:24,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102492639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:24,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:24,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-29 09:06:24,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891366182] [2021-08-29 09:06:24,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 09:06:24,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:24,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 09:06:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:24,755 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:25,124 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-08-29 09:06:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 09:06:25,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 09:06:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:25,126 INFO L225 Difference]: With dead ends: 91 [2021-08-29 09:06:25,126 INFO L226 Difference]: Without dead ends: 66 [2021-08-29 09:06:25,126 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 191.85ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-08-29 09:06:25,127 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.78ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:25,127 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 372 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 192.78ms Time] [2021-08-29 09:06:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-29 09:06:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2021-08-29 09:06:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-29 09:06:25,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2021-08-29 09:06:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:25,133 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-29 09:06:25,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-29 09:06:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 09:06:25,134 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:25,134 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:25,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 09:06:25,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -984735834, now seen corresponding path program 1 times [2021-08-29 09:06:25,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:25,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429045365] [2021-08-29 09:06:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:25,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:25,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:25,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429045365] [2021-08-29 09:06:25,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429045365] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:25,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:25,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-29 09:06:25,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500093939] [2021-08-29 09:06:25,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 09:06:25,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 09:06:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:25,208 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:25,556 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-29 09:06:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 09:06:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 09:06:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:25,557 INFO L225 Difference]: With dead ends: 81 [2021-08-29 09:06:25,557 INFO L226 Difference]: Without dead ends: 64 [2021-08-29 09:06:25,558 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 154.28ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-08-29 09:06:25,559 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.22ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:25,559 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 405 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [16 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 206.22ms Time] [2021-08-29 09:06:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-29 09:06:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2021-08-29 09:06:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-08-29 09:06:25,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2021-08-29 09:06:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-08-29 09:06:25,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-08-29 09:06:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 09:06:25,566 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:25,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 09:06:25,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1995853084, now seen corresponding path program 1 times [2021-08-29 09:06:25,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:25,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351438599] [2021-08-29 09:06:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:25,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:25,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:25,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351438599] [2021-08-29 09:06:25,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351438599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:25,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:25,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 09:06:25,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909761351] [2021-08-29 09:06:25,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 09:06:25,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 09:06:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:25,702 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:26,102 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-08-29 09:06:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 09:06:26,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 09:06:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:26,103 INFO L225 Difference]: With dead ends: 73 [2021-08-29 09:06:26,103 INFO L226 Difference]: Without dead ends: 68 [2021-08-29 09:06:26,104 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 228.03ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-29 09:06:26,105 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.02ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:26,105 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 481 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [11 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 207.02ms Time] [2021-08-29 09:06:26,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-29 09:06:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 26. [2021-08-29 09:06:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-29 09:06:26,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-08-29 09:06:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-29 09:06:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-29 09:06:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 09:06:26,119 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:26,119 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:26,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 09:06:26,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1760411593, now seen corresponding path program 1 times [2021-08-29 09:06:26,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:26,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917404631] [2021-08-29 09:06:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:26,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:26,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917404631] [2021-08-29 09:06:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917404631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111367742] [2021-08-29 09:06:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:26,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:26,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 09:06:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 09:06:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-29 09:06:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-29 09:06:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:26,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:26,957 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-29 09:06:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-08-29 09:06:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:27,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111367742] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:27,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:27,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 7] total 27 [2021-08-29 09:06:27,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88368207] [2021-08-29 09:06:27,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-29 09:06:27,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-29 09:06:27,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-08-29 09:06:27,023 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:28,822 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-08-29 09:06:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-29 09:06:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-29 09:06:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:28,823 INFO L225 Difference]: With dead ends: 97 [2021-08-29 09:06:28,824 INFO L226 Difference]: Without dead ends: 92 [2021-08-29 09:06:28,827 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1822.86ms TimeCoverageRelationStatistics Valid=1072, Invalid=4478, Unknown=0, NotChecked=0, Total=5550 [2021-08-29 09:06:28,828 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 334 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 257.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 319.17ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:28,828 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 0 Invalid, 590 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [156 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 319.17ms Time] [2021-08-29 09:06:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-29 09:06:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 32. [2021-08-29 09:06:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-29 09:06:28,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 22 [2021-08-29 09:06:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:28,835 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-29 09:06:28,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-29 09:06:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 09:06:28,836 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:28,836 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:28,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 09:06:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-29 09:06:29,049 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash -911321928, now seen corresponding path program 2 times [2021-08-29 09:06:29,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:29,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393011945] [2021-08-29 09:06:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:29,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:29,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:29,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393011945] [2021-08-29 09:06:29,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393011945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:29,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972901148] [2021-08-29 09:06:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:06:29,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:29,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 09:06:29,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 09:06:29,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:06:29,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-29 09:06:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-29 09:06:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:29,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:30,066 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-29 09:06:30,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-08-29 09:06:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:30,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972901148] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:30,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:30,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 10] total 35 [2021-08-29 09:06:30,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719176038] [2021-08-29 09:06:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-29 09:06:30,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-29 09:06:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 09:06:30,117 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:33,847 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2021-08-29 09:06:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-29 09:06:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-29 09:06:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:33,849 INFO L225 Difference]: With dead ends: 145 [2021-08-29 09:06:33,849 INFO L226 Difference]: Without dead ends: 140 [2021-08-29 09:06:33,854 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4953 ImplicationChecksByTransitivity, 3805.14ms TimeCoverageRelationStatistics Valid=3446, Invalid=13584, Unknown=0, NotChecked=0, Total=17030 [2021-08-29 09:06:33,855 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 488 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.53ms SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 423.55ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:33,855 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 0 Invalid, 834 Unknown, 0 Unchecked, 4.53ms Time], IncrementalHoareTripleChecker [300 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 423.55ms Time] [2021-08-29 09:06:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-29 09:06:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 44. [2021-08-29 09:06:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-08-29 09:06:33,882 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 28 [2021-08-29 09:06:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-08-29 09:06:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-08-29 09:06:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-29 09:06:33,887 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:33,887 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:33,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:34,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-29 09:06:34,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash -998842154, now seen corresponding path program 3 times [2021-08-29 09:06:34,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:34,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007973366] [2021-08-29 09:06:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:34,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:34,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:34,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007973366] [2021-08-29 09:06:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007973366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:34,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298602767] [2021-08-29 09:06:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 09:06:34,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:34,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 09:06:34,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 09:06:34,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 09:06:34,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:34,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-29 09:06:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-08-29 09:06:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-29 09:06:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:35,195 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-29 09:06:35,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-08-29 09:06:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-29 09:06:35,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298602767] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:35,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:35,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 11] total 35 [2021-08-29 09:06:35,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777609444] [2021-08-29 09:06:35,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-29 09:06:35,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-29 09:06:35,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 09:06:35,411 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:40,331 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-08-29 09:06:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-29 09:06:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-29 09:06:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:40,332 INFO L225 Difference]: With dead ends: 139 [2021-08-29 09:06:40,332 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 09:06:40,336 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6206 ImplicationChecksByTransitivity, 4899.95ms TimeCoverageRelationStatistics Valid=2289, Invalid=19173, Unknown=0, NotChecked=0, Total=21462 [2021-08-29 09:06:40,336 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 406 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 430.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.22ms SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.84ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:40,337 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 0 Invalid, 1333 Unknown, 0 Unchecked, 5.22ms Time], IncrementalHoareTripleChecker [293 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 504.84ms Time] [2021-08-29 09:06:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 09:06:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 09:06:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 09:06:40,338 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-08-29 09:06:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:40,338 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 09:06:40,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 09:06:40,339 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 09:06:40,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 09:06:40,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:40,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:40,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 09:06:40,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:41,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:41,769 INFO L854 garLoopResultBuilder]: At program point L44(lines 33 52) the Hoare annotation is: false [2021-08-29 09:06:41,769 INFO L858 garLoopResultBuilder]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L854 garLoopResultBuilder]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse3 (select (select |#memory_int| ULTIMATE.start_main_~pd2~0.base) ULTIMATE.start_main_~pd2~0.offset)) (.cse1 (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset)) (.cse2 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse4 (= |~#d1~0.offset| 0)) (.cse5 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse6 (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset))) (or (and .cse0 .cse1 .cse2 (= (+ ULTIMATE.start_main_~i~0 2) .cse3) .cse4 .cse5 .cse6) (and (or (and .cse0 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|)) (and .cse0 .cse1 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|))) (= .cse3 (+ ULTIMATE.start_main_~i~0 10)) .cse2 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse4 (= ULTIMATE.start_main_~i~0 .cse3) .cse5 .cse6) (and .cse0 .cse1 .cse2 (= (+ ULTIMATE.start_main_~i~0 5) .cse3) .cse4 .cse5 .cse6) (and .cse0 .cse1 (= .cse3 (+ ULTIMATE.start_main_~i~0 9)) .cse2 .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 (= .cse3 (+ ULTIMATE.start_main_~i~0 4)) .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 (= .cse3 (+ ULTIMATE.start_main_~i~0 8)) .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 (= .cse3 (+ ULTIMATE.start_main_~i~0 7)) .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 (= .cse3 (+ ULTIMATE.start_main_~i~0 1)) .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse4 (= .cse3 (+ ULTIMATE.start_main_~i~0 6)) .cse5 .cse6) (and .cse0 (= .cse3 (+ ULTIMATE.start_main_~i~0 3)) .cse1 .cse2 .cse4 .cse5 .cse6))) [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 50) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L24-2(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L854 garLoopResultBuilder]: At program point L24-3(lines 22 25) the Hoare annotation is: (let ((.cse1 (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (.cse0 (= |~#d1~0.offset| 0))) (or (and (not (= |~#d1~0.base| |~#d2~0.base|)) .cse0 .cse1 (= |ULTIMATE.start_get_dummy_#res.offset| 0)) (and (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) (not .cse1) .cse0 (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|)))) [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L24-4(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L24-6(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,770 INFO L854 garLoopResultBuilder]: At program point L24-7(lines 22 25) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and .cse0 (not (= ULTIMATE.start_main_~pd1~0.base |ULTIMATE.start_get_dummy_#res.base|))) (and (or (and (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) (not (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|)) (and .cse0 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= |ULTIMATE.start_get_dummy_#res.offset| ULTIMATE.start_main_~pd1~0.offset) (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|))) (= |~#d1~0.offset| 0)))) [2021-08-29 09:06:41,770 INFO L858 garLoopResultBuilder]: For program point L24-8(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L24-10(line 24) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L854 garLoopResultBuilder]: At program point L24-11(lines 22 25) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|)))) (or (and .cse0 (not (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base))) (and (let ((.cse2 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|)) (.cse1 (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset))) (or (and .cse0 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse1 .cse2) (and (not .cse2) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse1))) (= |~#d1~0.offset| 0)))) [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L37-2(lines 37 46) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L37-4(lines 37 46) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L854 garLoopResultBuilder]: At program point L29(lines 27 30) the Hoare annotation is: (and (not (= |~#d1~0.base| |~#d2~0.base|)) (= ULTIMATE.start_main_~pa~0.offset ULTIMATE.start_main_~pd2~0.offset) (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base) (<= 1 |ULTIMATE.start_check_#res|) (= |~#d1~0.offset| 0) (= ULTIMATE.start_main_~i~0 (select (select |#memory_int| ULTIMATE.start_main_~pd2~0.base) ULTIMATE.start_main_~pd2~0.offset)) (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base) (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset)) [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-08-29 09:06:41,771 INFO L861 garLoopResultBuilder]: At program point L51(lines 32 52) the Hoare annotation is: true [2021-08-29 09:06:41,771 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-08-29 09:06:41,774 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:06:41,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:06:41 BoogieIcfgContainer [2021-08-29 09:06:41,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:06:41,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:06:41,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:06:41,811 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:06:41,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:23" (3/4) ... [2021-08-29 09:06:41,814 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 09:06:41,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-29 09:06:41,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-29 09:06:41,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 09:06:41,822 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 09:06:41,837 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(d1 == d2) && d1 == 0) && d1 == \result) && \result == 0) || (((\result == d2 && !(d1 == \result)) && d1 == 0) && d2 == \result) [2021-08-29 09:06:41,837 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!(d1 == d2) && !(pd1 == \result)) || (((((d2 == pd1 && \result == d2) && !(d1 == \result)) && d2 == \result) || (((!(d1 == d2) && d1 == pd1) && \result == pd1) && pd1 == d1)) && d1 == 0) [2021-08-29 09:06:41,838 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && 1 <= \result) && d1 == 0) && i == unknown-#memory_int-unknown[pd2][pd2]) && pd1 == pd2) && pd2 == pd1 [2021-08-29 09:06:41,855 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 09:06:41,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:06:41,855 INFO L158 Benchmark]: Toolchain (without parser) took 19155.29ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 49.7MB in the beginning and 76.0MB in the end (delta: -26.3MB). Peak memory consumption was 27.5MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,856 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 35.4MB in the end (delta: 49.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:41,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.77ms. Allocated memory is still 71.3MB. Free memory was 49.4MB in the beginning and 39.6MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.79ms. Allocated memory is still 71.3MB. Free memory was 39.4MB in the beginning and 53.8MB in the end (delta: -14.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,856 INFO L158 Benchmark]: Boogie Preprocessor took 39.25ms. Allocated memory is still 71.3MB. Free memory was 53.8MB in the beginning and 52.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:41,857 INFO L158 Benchmark]: RCFGBuilder took 279.26ms. Allocated memory is still 71.3MB. Free memory was 52.4MB in the beginning and 42.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,857 INFO L158 Benchmark]: TraceAbstraction took 18518.43ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 41.7MB in the beginning and 80.2MB in the end (delta: -38.5MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,857 INFO L158 Benchmark]: Witness Printer took 43.89ms. Allocated memory is still 125.8MB. Free memory was 80.2MB in the beginning and 76.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 09:06:41,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 35.4MB in the end (delta: 49.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.77ms. Allocated memory is still 71.3MB. Free memory was 49.4MB in the beginning and 39.6MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.79ms. Allocated memory is still 71.3MB. Free memory was 39.4MB in the beginning and 53.8MB in the end (delta: -14.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.25ms. Allocated memory is still 71.3MB. Free memory was 53.8MB in the beginning and 52.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 279.26ms. Allocated memory is still 71.3MB. Free memory was 52.4MB in the beginning and 42.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 18518.43ms. Allocated memory was 71.3MB in the beginning and 125.8MB in the end (delta: 54.5MB). Free memory was 41.7MB in the beginning and 80.2MB in the end (delta: -38.5MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. * Witness Printer took 43.89ms. Allocated memory is still 125.8MB. Free memory was 80.2MB in the beginning and 76.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 50]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18427.43ms, OverallIterations: 8, TraceHistogramMax: 11, EmptinessCheckTime: 23.01ms, AutomataDifference: 12288.47ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 1227.45ms, InitialAbstractionConstructionTime: 13.86ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1579 SdHoareTripleChecker+Valid, 2151.99ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1579 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1765.12ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 953 mSDsCounter, 835 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3507 IncrementalHoareTripleChecker+Invalid, 4342 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 835 mSolverCounterUnsat, 0 mSDtfsCounter, 3507 mSolverCounterSat, 30.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 565 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12548 ImplicationChecksByTransitivity, 11417.87ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=7, InterpolantAutomatonStates: 333, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 80.84ms AutomataMinimizationTime, 8 MinimizatonAttempts, 320 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 67 NumberOfFragments, 487 HoareAnnotationTreeSize, 7 FomulaSimplifications, 661799 FormulaSimplificationTreeSizeReduction, 460.20ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 14631 FormulaSimplificationTreeSizeReductionInter, 760.78ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 63.23ms SsaConstructionTime, 265.73ms SatisfiabilityAnalysisTime, 3553.47ms InterpolantComputationTime, 279 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 355 ConstructedInterpolants, 0 QuantifiedInterpolants, 2245 SizeOfPredicates, 38 NumberOfNonLiveVariables, 455 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 181/396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && i + 2 == unknown-#memory_int-unknown[pd2][pd2]) && d1 == 0) && pd1 == pd2) && pd2 == pd1) || (((((((((!(d1 == d2) && d1 == pd1) && pa == pd2) && pd1 == d1) || (((!(d1 == d2) && pa == pd2) && d2 == pd1) && pd1 == d2)) && unknown-#memory_int-unknown[pd2][pd2] == i + 10) && pd2 == pa) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && d1 == 0) && i == unknown-#memory_int-unknown[pd2][pd2]) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && i + 5 == unknown-#memory_int-unknown[pd2][pd2]) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && unknown-#memory_int-unknown[pd2][pd2] == i + 9) && pd2 == pa) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && unknown-#memory_int-unknown[pd2][pd2] == i + 4) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && unknown-#memory_int-unknown[pd2][pd2] == i + 8) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && unknown-#memory_int-unknown[pd2][pd2] == i + 7) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && unknown-#memory_int-unknown[pd2][pd2] == i + 1) && d1 == 0) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && d1 == 0) && unknown-#memory_int-unknown[pd2][pd2] == i + 6) && pd1 == pd2) && pd2 == pd1)) || ((((((!(d1 == d2) && unknown-#memory_int-unknown[pd2][pd2] == i + 3) && pa == pd2) && pd2 == pa) && d1 == 0) && pd1 == pd2) && pd2 == pd1) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (!(d1 == d2) && !(pd1 == \result)) || (((((d2 == pd1 && \result == d2) && !(d1 == \result)) && d2 == \result) || (((!(d1 == d2) && d1 == pd1) && \result == pd1) && pd1 == d1)) && d1 == 0) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (!(d1 == d2) && !(pd1 == pd2)) || (((((!(d1 == d2) && d1 == pd1) && pd2 == pd1) && pd1 == d1) || (((!(pd1 == d1) && d2 == pd1) && pd1 == d2) && pd2 == pd1)) && d1 == 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((!(d1 == d2) && pa == pd2) && pd2 == pa) && 1 <= \result) && d1 == 0) && i == unknown-#memory_int-unknown[pd2][pd2]) && pd1 == pd2) && pd2 == pd1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((!(d1 == d2) && d1 == 0) && d1 == \result) && \result == 0) || (((\result == d2 && !(d1 == \result)) && d1 == 0) && d2 == \result) RESULT: Ultimate proved your program to be correct! [2021-08-29 09:06:41,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...